MORNIN guys hope all are stuffd full of bird,, heres the run down , I blew my engine bought another used from SW engines said it was tested, so when I got it I had every gasket replaced to be sure so it has been opened up n clean thourghly, since ive had installed I keep getting the same freakin code miss fire no 4, this is what I have done, ngk plugs, ac deloco gold plug wire set, new distributor n cap... not sure what else? any ideas of such would be appreciated? thanks guys happy holidays THE MILKMAAN

 

Engine displacement and year please.

 

How many miles on it, what does the spark plug look like? Did they do a compression check, if so what was it?

 

It's a 4.3 L V6 vortec, next step is a compression test, it runs great doesn't flutter when u punch it, it takes off, been talking it maybe the reluctor wheel?

 

You can check the pickup, should be around 1000 +- 200 ohms, also if you pull it, the magnet should be able to pick up a couple small screws. I doubt it's the ring.

 

Having a 2nd compression test done, first one was then good but for some reason I'm still getting a po304 code... be honest I'm beginning to think my truck is simply possessed...will chk back...